Low voltage warning

lol. minus the semis. This is a truck blog. why not say "minus trucks", lol. I vote for the 59 yo dude. At least he support his claims with research and documentation. Half of you educated mechanics are worth crap nowdays. You just replace everything you see till you happen to replace the broken part. must be nice to be paid by hour. Im a 26yo, carrier, OP.

 

thanks for the update. im having problems with my batteries/alternator right now

 

Check and clean all battery terminals

 

Success via this thread !
Brain991219- thanks buddy .

I was away 200kms when battery warning light came up on dash with ‘BATTERY VOLTAGE LOW’ warning message (during night ).
Luckley it was still charging 12.8 ( lights on , fan/blower off).
Took the truck home so I can start diagnostics early morning. As this thread , I bought the multimeter first ($40)and checked voltage direct from alternater . Reading was 12.8. . Bought alternator for $350+tax . Paid $200 to get it changed on driveway ( new bee here fellas , didn’t want to make mess .
But I’ll get better. I promise ) .

 

Usually it’s the alternator if you’re cruising down the road and get low voltage warning. Alternators can run the car/truck entirely and have some to spare to trickle charge the batteries.

If your alternator wasn’t too old I’d check to why it died so early. I know with cars running batteries too low too often wears the alternator more pretty sure truck alternators are built tougher to counter this issue. Loose or old rotting belts also make the alternator work harder.

 

Good point ! I hear some belt noice but not everyday . But both belts seems tight.what could be the best way to find the problem ? Thanks